Breadcrumb

When a fault occurs in a transmission and distribution (T&D) system, current increases and voltage decreases. The increased current causes excessive heating, which, depending on where the fault occurs, can result in a fire or an explosion. If the fault is not quickly isolated, it can damage that may result in loss of service. T&D systems use various types of control systems to detect and isolate faults with minimum disturbance. A key component of all of these control systems is the protective relay.

COURSE GOALS

This training program examines the functions and operation of some types of protective relays that are commonly found in substations and switchyards.